The Minnesota primaries are Tuesday. Voters will cast their ballots to narrow the general election ballot.

Minnesota does not require voters to register under a political party. But in primaries voters must choose only one party to vote for in partisan races. Here's what you need to know in this race:

U.S. Representative District 6

PRIMARY ELECTION AUG. 14 || GENERAL ELECTION NOV. 6

U.S. Rep. Tom Emmer(Photo: U.S. House Office of Photography)

Tom Emmer

Republican, party-endorsed candidate

Residence: Delano

Experience: District 6 representative since 2015, served as state representative from 2005 to 2010, former conservative radio host, graduated from the University of Alaska-Fairbanks and William Mitchell College of Law.

Top issues: Deregulating small businesses,funding transportation, national and border security, replacing the Affordable Care Act, reducing the deficit, trade.

A.J. Kern

Republican

Residence: Sartell

Experience: Veteran of the U.S. Army Reserve, one-term member of the Benton County Planning Commission, worked as a county planner and zoning specialist, conservative writer for the St. Cloud Times Writers Group, earned degrees from Montana State University and the University of Wyoming.

Patrick Munro

Republican

Residence: Princeton

Experience: A 26-year member of the U.S. Army Reserve, served two years on active duty in the Iraq War as Civil Affairs Team sergeant, owns a small business that includes a lawn care company, works in material handling, earned master's and bachelor's in business administration from Metropolitan State University in St. Paul.

Top Issues: Immigration reform including an end to "chain migration," construction of a wall on the U.S.-Mexico border, small business medical practices, defense of gun rights.